Optically variable security devices

Optically variable security devices

Dielectric based metasurface hologram device and manufacturing method of same and display device having same

Microstructured device with embossed layer

OPTICALLY VARIABLE SECURITY DEVICES

Multiple layer holographic metal flake film and method of manufacturing the same

Method and apparatus for aligning microbeads in order to interrogate the same

Encoded particle having a grating with variations in the refractive index

Thermoplastic comprising metal identification platelets

SECURITY ARTICLES AND DEVICES CONTAINING CODED HOLOGRAPHIC PLATELETS AND METHODS OF MANUFACTURING THE SAME

Optical reader for reading encoded microparticles

Security Device With Metameric Features Using Diffractive Pigment Flakes

Methods and systems for writing an optical code within or on a fiber substrate

Metal identification platelet and method of producing thereof

Article With Micro Indicia Security Enhancement

Deposition of photosensitive media for digital hologram recording

Method of manufacturing of a diffraction grating-based optical identification element

Security devices incorporating optically variable adhesive

Adhesive Chromagram And Method Of Forming Thereof

REFLECTION TYPE DIFFUSE HOLOGRAM, HOLOGRAM FOR REFLECTION HOLOGRAM COLOR FILTERS, ETC, AND REFLECTION TYPE DISPLAY DEVICE USING SUCH HOLOGRAMS

Security device with metameric features using diffractive pigment flakes

Microstructured optical device for remote chemical sensing

Covert security coating

Deposition of photosensitive media for digital hologram recording

Large pattern printing

Method and apparatus for aligning microbeads in order to interrogate the same

Diffractive pigments

Surface relief structure

Alignable diffractive pigment flakes